Migrate doc-gen build to Rolldown

Author: joshblack

package-lock.json

@@ -21,9 +21,9 @@
   ],
   "scripts": {
     "clean": "rimraf dist",
-    "build": "rollup -c",
+    "build": "rolldown -c && tsc --project tsconfig.build.json",
     "type-check": "tsc --noEmit",
-    "watch": "rollup -c -w",
+    "watch": "rolldown -c -w",
     "test": "vitest --run",
     "test:watch": "vitest"
   },
@@ -36,17 +36,8 @@
     "yargs": "^18.0.0"
   },
   "devDependencies": {
-    "@babel/core": "^7.29.0",
-    "@babel/plugin-transform-runtime": "^7.29.0",
-    "@babel/preset-env": "^7.29.0",
-    "@babel/preset-typescript": "^7.28.5",
-    "@rollup/plugin-babel": "^6.1.0",
-    "@rollup/plugin-commonjs": "^29.0.0",
-    "@rollup/plugin-json": "^6.1.0",
-    "@rollup/plugin-node-resolve": "^16.0.3",
     "rimraf": "^6.0.1",
-    "rollup": "^4.59.0",
-    "rollup-plugin-typescript2": "^0.36.0",
+    "rolldown": "^1.1.2",
     "typescript": "^6.0.3"
   }
 }

packages/doc-gen/package.json

@@ -0,0 +1,22 @@
+import {defineConfig} from 'rolldown'
+import packageJson from './package.json' with {type: 'json'}
+
+const dependencies = [
+  ...Object.keys(packageJson.peerDependencies ?? {}),
+  ...Object.keys(packageJson.dependencies ?? {}),
+  ...Object.keys(packageJson.devDependencies ?? {}),
+]
+
+function createPackageRegex(name) {
+  return new RegExp(`^${name}(/.*)?`)
+}
+
+export default defineConfig({
+  input: './src/index.ts',
+  platform: 'node',
+  external: dependencies.map(createPackageRegex),
+  output: {
+    dir: 'dist',
+    format: 'esm',
+  },
+})